19915585

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{167}}^1$

素因数の和:273

約数の個数: 32

約数和(自身を含む): 26998272

約数和(自身を除く): 7082687

約数列:

[1, 5, 17, 23, 61, 85, 115, 167, 305, 391, 835, 1037, 1403, 1955, 2839, 3841, 5185, 7015, 10187, 14195, 19205, 23851, 50935, 65297, 119255, 173179, 234301, 326485, 865895, 1171505, 3983117, 19915585]

約数ペア:

[(1, 19915585), (5, 3983117), (17, 1171505), (23, 865895), (61, 326485), (85, 234301), (115, 173179), (167, 119255), (305, 65297), (391, 50935), (835, 23851), (1037, 19205), (1403, 14195), (1955, 10187), (2839, 7015), (3841, 5185)]